Telephone alarm system



Jan. l2, 1932. R. F, MAssoNNEAU ET AL 1,841,197

TELEPHONE ALARM SYSTEM Fil'ed Maron 27, 1931 17 Sheets-Sheet l ArroP/vfy Jam. 12, v1932. R. F. MAssNNEAU ET AL 1,841,197

' TELEPHONE ALARM sYsTEu Filed March 27, 1931 1'7 Sheets-Sheet 2 MARG/NAL RfMAsso/v/VEAU NVENTORS T. H ROBERTS Argom/5y Jan. 12, 1932.

R. F. MASSONNEAU ET AL TELEPHONE ALARM SYSTEM 1 Filed March 27, 19251 17 Sheets-Sheet. 5

A TTORNEY 1'7 Sheets-Sheet 4 R. F. MASSONNEAU ET AL TELEPHONE ALARM SYSTEM Filed March 27, 1931 `lan. l2, 1932.

Jail 12, 1932. R. F. MAssoNNEAU ET AL 1,841,197'

TELEPHONE ALARM sYs'LEn Filed March 27, 1931 17 Sheets-Sheet 5 RfMAssoN/VEAU WENTORS IHROBERTS ATTORNEY Jan. l2, 1932. R. F. MAssoNNEAU ET AL. 1,841,197

1 TELEPHONE ALARM SYSTEM Filed March 27, 1951 1v sheets-sneer e Rfmsso/VNEAU NVE/W0 IIL/.ROBERTS A T TORNEY Jan. 12, `l 932.

R. F. MAssoNNEAU ET AL 1,841,197

TELEPHONE ALARM SYSTEM Filed Mann 27 1951 17 sheets-sneer, 7

R. E MASSONNEAU Nm/m5 T. H. ROBERTS A TTORNEY Jan. l2, 1932.v R. F. MAssoNNEAU ET AL 1,841,197

TELEPHONE ALARM SYSTEM Filed March 27, 1931 '7 Sheets-Sheet. 8

A T TORNEV Jan. l2, 1932- R. F. MAssoNNEAU ET AL v 1,841,197

TELEPHONE ALARM SYSTEM Filed March 27, 1931 1'z4sneets-sner 9 R. EMA ssoN/VEAU Nm/TOPS T. H. ROBERTS F/a. 9 y

Jam 12, 1932 R. F* MAssoNNEAu ET Al. 1,841,197

NVENTORS By @.grwf

TTORN jam. 12,1932, R. F. MASSONNEAU ET AL 1,841,197

TELEPHONE ALARM SYSTEM Filed March 27, 1951 17 .sheets-sheet 11 N l a n E@ N Rf. MAssoA/NEAU NVENTORS T. H. ROBERTS j A TTORNEV Jan'. 12, 1932. R. F, MASSONNEAU ET AL 1,841,197

TELEPHONE ALARM SYSTEM l Filed Maron 27'. 1,931 17 sheets-sheet 12 F/RS T SENDER L By @D 6. M

Jan. `12, 1932. R F. MA'ssoNNl-:Au ET AL 1,841,197

TELEPHONE ALARM SYSTE Filed March 2v, 1931 17 sheetssheet 13 DE TE C 7' 0f? CICU/ 71S POLAR/Z50 R. E MAsso/VNEAU NVEVTORS r. H. ROBERTS ArroR/ver FIG/3 Jan. l2, 1932.

R. F. MAssoNNE-Au r-:r A1.

TELEPHONE ALARMl SYSTEM Filed March 27, 1931 /NL'NTORS l7 Sheets-Sheet 14 Rf MASSON/venu runoff/ers V ATTORNEY TELEPHONE ALARM SYSTEMy Filed March 27, 1931 1'7 Sheets-Sheet 15 R. F. MASsoA/NEAU NVE/"ORS 7H ROBERTS A T TORNEV Jan. 12, 1932. R. F. MAssoNNEAu ETAL TELEPHONE ALARM SYSTEI ts-Sheet 16 Yws /NvENToRs AU By 6? .M

A T TORNEY Jan. 12,' 1932. n. F. MAssoNNEAu ET-AL r1,841,197

TELEPHONE ALARM ss'rl Filed March 27, 1951 17 Sheets-Sheet 17 Rf. MAszso/v/vle-Ay4 /NVENTORS IHROBERS thosein charge of "e'mergencies arise. y kAn' o bjectfofV the present invention is the' which diiiiculty arises to another piedeter! mined machine.` The switching `o}3e'rations currents generated by fthe machine yis-lar?? 35 Patented Jan.Y 12, 1932 UNITED STATES Y,

ROBERT MAssoNNEAu, on Y SCARSDAIQE, Ann THOMAS n. -noBEnTs,.-,0F EWJYORK,

n. Y.,AssIeNoRs To BELL Tniznriionn LABORATORIES, iNconPonATnn oprimir kYORK,N Y.,1iYconi?oiiiiiiononnnwYORK v .-1

l TELnnHoNE'ALARi/i SYSTEM f application meu Marci; 27, 193i. .serial No. 525,664.VK

This invention Vrelates to telephone systems and more particularly to systems c invvhicli connections "are lestalo'lished bythe joint `op.

eration of automatic andmanual-means."

One outgrowth of the development of automatic telephone practice hasbeen the pro# vision of means for-'informing a manualy operator of the wants ofl a calling subscriber whoseV line terminates' ina dial-switching office. A convenient method and onefwhichrequires Va minimum fof: equipment atA the manual oiiice is the provisionv of means 'at the automatic oflice for spealringtlie wanted number to themanual operator Vunder the control ofthe recorded designation. inthe commercial use of such a'systemfitbecomes necessary to provide spare equipment to carev for `emergencies and means` foriii'forming the'` equipment when such provision of efficient andY economicalmeans for insuring continuitv of servicefin'asystem To this end switching means isgprovided under manual control for -associat1ngvany machine withanyload andauiider automatic control means fortransferring aloadon whether 'manual' or automatic are performed inV synchronism with the operationof 'the machine@ Means responsive ,tothe speech ranged to operatelan'alarm and to -initiate the automatic switching operation incase of speech failure. Other features arelalso p io'. vided which willA become apparent during the detaileddescription ofthe circuitsi f more clearly understood fromaconsideration of the following description in connection- .with the drawings in which/:L

il Figs. v1,-

eiland ,5 show' portions of one l5`r additional sender;

Figs.V 3,' 6 speech detector Vmachines; and

These features 'of the invention ivill"`be f cuits for associating senders with the call announcermachines;if;-S Figs; 9 and-16 show therepeating. coil con@ nections-'in the channels selectable by the senders; Y' Figs. li :and 15 show l the call announcer' iFi'g. 18V shows theinanner `in whichffthe remaining figures should 13e-arranged. The circuits shown in Fgs. 1, 2`, 4and?5 have been taken from theftandein sender dis' closedand claimed in ther-application 'of H. Roberts; SerialNoASAB@ iiled Septem-'f ber 30, Y1930, and the {sa-ine numerical desige' nations haver been used as* in that applica'- tion to facilitatereferencethereto.

The senders of an officey are Adivided into.

two groupsnforconnection wit-lit'he callfane' nouncer machine. For conveniencethesetwos groups may belrnown astheA load and the? B". load; vEach 'sender' is provided with a set of-relays,joperable in accor-dance with the set! ting of the registers, which connect vthe funda-f Y mental circuit-to one offourteen different channels over eachlof Whichla diifeient ele- Amentof a subscribers designation is received.l

These y'fourteen channels areconnected in mult-ipleto all'of the sendersof 'onelo'adfand are selectable in accordance with the regisV tered designation to cause the pronouncement of such designation. "f

In order tofinsure' satisfactory service atl -all `timesfthree call announcer vinach-ines are,

provided; that is,J onel more thanf-thenuinber of loads. Each call announcer machi-iiein# cludes fourteen announcer tunits'which feed speechpulrrents out oven` fourteen speech channels. Ordinarily each of the f loads isi' carried bya different' machine andthe third machine is out vof service` 'oithe'f purpose o'f adjustmentsgandf repair or inerelygin reserve.V

As will befidescrihjedy liereinaften' 2 switch fing means is provided for fconnectingthetwo sender loads with` anyone or 4two'ofthe fcalfl'V announcer machines. Ase't ofswi-tching 1r'ef laysfis provided "for each possibleconil'iina-= v tion ofsender i load and lim.uhine\,=-together1 with means for' creating` fthese"-vv combinations either 4manually :or `ini-tomatic-ally."- The ari rangement is suchy while any combina# tion may be brought about manually, only a combination predeterminedv by the existing conditions can be set up automatically. For

convenience these switching units have been shown as VAincluding a ,multi-contact. relay for connecting Athefourteen selectable channels of the load with the fourteen speech channels of the machine as well as extending the syn` chronizing conductors to the senders. However, the-substitution oaplurality of simple relays for the multi-contact relays would bean obvious expedient. A i

In the establishment of a' connection through the use of a call' announcer it is essential that continuousKV reiterated pros nouncements of the digitsbe available to the sender since the failure of any channel would mutilate the ldesigna-tions including thatV chine Vthen in usev rather than tothe idle *i photoelectricV cell for translating the record,

machine because of the delay necessary in starting theidle machine and the possibility that it mayn'ot be ready for operation. However, thealarm informs the attendant that the transfer ha'sroccurred and. he'may then Y startethevgreserve-machineand'connec't one load to 1t. 1 L

4' lfhecall announcerV machineV comprises fourteen `speech generating elements, one for eachof the vnumerical digitsand one Vfor each of the four lettersused as stations designations. Each unit comprises a 'lightsourca a lens fonico-using the light gona slit (not shown), a photographic record of the pro.

nouncement of thev corresponding digit, a

into. electrical speech currents and one or morevfamplifiers toraise the vvolume of the speechr currents to 'the usual Vconversational level. Thephotographic record is mounted on, a drum for rotationbetween the light source and the photoelectriccell, and in practice two records are mounted over slits `on the outer margins of thevsame drum.A The drums areof-suchsize that the record or" the pronouncement is .repeated number of times,

during eachV revolution of the drum, and the iilm 1s apaque fbetween the Y pronouncements.

y These dark spaces permit the reenforcement ofthe drum and areof suchlength astosimu-` er mechanism which connects ground to a plurality ofsynchronizingleads during the interval when the speech record is passing between the light source and photoelectric cell, and disconnects ground therefroml during the silent intervals. These leads are eXtended'inrmultiple to groups of senders where the intermittent ground controls the successive establishment oit' the speechfcircuits in synchronismA with the pronouncements by VJche machine.

VBranches of'one of these leads are lalso eX- Briefly the .operation of the sender, in

-extending a c'onnectionthrough the use of the call announcer machine, is as Afollows: When the sender has Abeen selected andassociated through a district selector with a sender at the originating oiiice, ground is connected to conductor V909 and a circuit is established from the relay call indicator impulser of they originating sender through relays 1122, 1123 and 1124 inseries. `Following" the establishment of this circuit, kthe impulser rsends out code impulses in the well known manner, operating relayr1122 intermittently to control the transfer relays, bycontrolling relays 1132 and 1134, and operatingrelays 1123 and1124 in `accordance with the registered designation, to cause the recording Yof .that designa'- tion on the registers of the tandem sender. Since only theV numerical designation of a subscribers line, including the stations digit, is transmitted by call announcement,the code registers have been'oinitted andthe corre.- sponding transfer relays, with theeXception of relays 1106 yand 1107.

Assuming that the numerical designation of the wanted number is 2245,-R, relays 1211 and 1212 of the stations register 1210 and Arelays 1221, 1302, 1313V and 1324 of the thou-A sands, hundreds, tens andunits registers re# spectively will be operated. When the transfer relaysassociated with the tandem units register have been operated, theA operation of the decoder is initiated and the office codeis translated intoa setting fort-he selection control registers which determines the operation of the selectors at the tandem office in select-v ing a trunk outgoing -to the wanted office.

The decoder Valsocauses the operation of the'Y class relay which determines the manner ,in which the call must l'be completed at: the dis? tant oice. @In the caseof a call to be come -pleted at a manual oiliceto which the designation is to be transmittedby means of call announcements, the sender preparesa talking circuit whichgincludes condenser 2523 and the left windings of repeating coil 2500. When the hundreds digit has` been received and the class relay, indicating the fcall an-k nouncer class ofi call,f,has been. operated, relayl 2403 is also operated.Z This -relay connects ground toconductor 2405 and prepares circuits vfoncontrolling transmissiony of the call announcement. The callv announcer machine intermittently connects,k ground to conductor 1004 over conductor, 1180 `as above described. When the trunk tothe distant .5 oiice has been foundand thesender sequence 5, grounded conductor 2405is connected to the 20, to conductor 2405. lRelay 2518v prepares a shunt is opened, relay 25'19'operates connect agwinding `of relay-52411, .resistance 2410 and` front Contact of relay 2514 and, when relay 2514 operates, over the normal contact kof relay 2518 to .thewinding of that relay and-bat.- tcry. 2518 operates andloc'ksdirectly circuit for relay 2519 which is ineective until relay 2514 releases at the beginning of the silent interval', because of the shunt over the back Contact of relay 2519. When this in. the right windings ot repeating coil 2500 to the armatures ofrelay 2620V whence it is directed to one of the speechchannels in accorda-nce with the operation ofrelays 2620 0; to 2627;. Relay 2519 also completes the cir.-

cuit through the left windings of repeating coil2500 andconnects the armature of relayv 2514 over the'outer upper Viront contact .ofV

reiay 2519 to the upper normal Contact and batt-ery. Relays 2411 and 2408 kare operated andreleas'edunder the control ofrelay 2514 and the operation and release vot Vrelay 2408 cause a similarcycle of operations by relays 40;'2414 and 2407,while relay 2414 vcontrols va.

pair of counting relays 2406*'and l2413 When relays 2408, 2411, 2407,-2414,2406 andl 2413 are all `non-operated, a circuit is closed from battery through the wi-ndinggof Vrelay 5*,1601 -to groundedk conductor 2405..4 The grounding of conductor 2405 l. connected ground to the front contacts of the operated rrelays of the thousands register 1220 so that the relays 1602 to 1605 are operated in comobination in accordance with the operation of 1 that relay 1221 was operated alone,relay 1605,l

CQ jthefback contacts'of relay 2620, back contactsv relaysV 1221 to`1224.` The operation of relay 1601therefore connects relays 2620A to 2625 over itscontacts to the circuits controlled by relays'1602 to 1605. Since it was assumed will have been operated andthe lcircuit of relays and 2625 completed. Therefore the .talking circuit through theright Windings ot repeating coil .2500-isextended over of Vrelay 2623, kfront contacts. of relay 2622, back contacts of relays 2624^afnd `2626 to .the llo. 2 unit of the callannouncement machine. Y As `relays .2406. 2407',-;2408", 2411,-V 2413 and 2414 are?operatedeandreleased, they 'succes Sively- @105e {circuits l'for/relays 130,5, i315,V

1325 and 1215.. 'v These relaysl supply ground to the armatures ,of the corresponding regisf ter relays andv therefore operate' ,relays 2,620

to 2625 in` combination to jcause the pronouncement of the remaining digits. Relays 262,6 and 2627. are `operated in aralleliwith relay 1215, when the stations igitis to be pronounced, todirect the, talking circuit to the channels over which the stations letters are being spoken. When the last `Adigit has bee1rpronounced,'the locking Vcircuit of relay 2518-is Aopened and relay 2519 is released,

.disconnectingk the sender from theselectable channels. The senderis thereupon released and the talking connection established.v` The operationof the sender circuits is disclosed and describedin detail in the'above identified Roberts application. y Y 1 .Y y

In describing the operation of the switching mechanism, lit will be assumed either that the call announcer feature isto be set into operation for the iirst time or that it is to be restarted following a shut down, that is,tliat none of the machines arefworking and are also be'. assumed, forV the: purpose `of illustra- .90j .therefore connectedtoneither load. It will tion, that the A load is to -beconnected to the Y No. 1 call announcer machine which isthe one` shown in'Fig. 11. Motor 1176 will be started into operation, rotating the drums 1160l to 11'4-andr cam 1175. Next key 972 is operated by moving it from left to right. This opens a numberof normally closed circuits which are employed .in `the automatic *transfer` of. the loads and connects ground through the wind.-

lamp-970 as a guard lamp and prepares a cir,rv cuit for holding certain relays operated in the switching circuits. The A-l key 704 indiingiof-relay971togbattery. Relay 971 lights` i* vidualY to the combination of the A load with*A the first machine isthen operated and finally start key 973. Keysr972- and 704v are selil y locking, but key- 973:must beheld operated until the A-1 lamp 703 llights as anindica- .tion thattheA load and theNo. 1 machine.

have been connectedtogether. The operation of key 973 closesa circuit for relay 734 which in turn operates relay 7 35.` It also operates: rela-y 17.34 in turn operating-relay;v1735. 'Ay

vchain circuit is now closed toinsure thatonlyone machine will be connected to a load at a time. This circuit may be traced' fromjbattery through the Winding, of relay 705, lower operated contact vof key '704` lower normal Contact 0f keys 714 and 724,right front contact of relay 7 34, left back cor'itactsv of relaysj Y 722, 712 and 702, normal contact of key 730 to ground.. Keys 714 and 7 24 are individual Y to thel combination Vof the A loadwith theNo.. 2 andNo. 3 machines respectively. c Y

Y; v'During theneXt pronouncement, ground is connected over contact'117 9,.by lcam l117 5 acte' ing. on .interrupter 117 8 tofconductor 511180, Y

remontar of remyqroefright. Windinsofi 

